(function () {
  var config = Object.assign({
    apiBaseUrl: "http://localhost:9098"
  }, window.VISITOR_LOGIN_CONFIG || {});

  var state = {
    tree: [],
    flat: [],
    selectedAreaId: null,
    mode: "add",
    currentAreaId: null
  };

  init();

  function init() {
    if (!getToken()) {
      redirectToLogin();
      return;
    }
    bindLayoutActions();
    bindPageActions();
    applyUserInfo(readLoginUser());
    loadProfileName();
    loadAreaTree();
  }

  function bindLayoutActions() {
    var userMenuButton = document.getElementById("userMenuButton");
    var userDropdown = document.getElementById("userDropdown");
    var fullscreenButton = document.querySelector(".icon-button");

    userMenuButton.addEventListener("click", function (event) {
      event.stopPropagation();
      var hidden = userDropdown.hidden;
      userDropdown.hidden = !hidden;
      userMenuButton.setAttribute("aria-expanded", String(hidden));
    });

    userDropdown.addEventListener("click", function (event) {
      var action = event.target.getAttribute("data-action");
      if (!action) {
        return;
      }
      userDropdown.hidden = true;
      userMenuButton.setAttribute("aria-expanded", "false");
      if (action === "home") {
        window.location.href = "./dashboard.html";
      } else if (action === "logout") {
        logout();
      }
    });

    document.addEventListener("click", function () {
      userDropdown.hidden = true;
      userMenuButton.setAttribute("aria-expanded", "false");
    });

    fullscreenButton.addEventListener("click", function () {
      if (!document.fullscreenElement && document.documentElement.requestFullscreen) {
        document.documentElement.requestFullscreen();
      } else if (document.exitFullscreen) {
        document.exitFullscreen();
      }
    });
  }

  function bindPageActions() {
    document.getElementById("addRootButton").addEventListener("click", function () {
      openAreaModal("add", { parentId: 0 });
    });

    document.getElementById("areaSearchButton").addEventListener("click", function () {
      loadAreaTree();
    });

    document.getElementById("areaSearchInput").addEventListener("keydown", function (event) {
      if (event.key === "Enter") {
        loadAreaTree();
      }
    });

    document.getElementById("areaForm").addEventListener("submit", function (event) {
      event.preventDefault();
      saveArea();
    });

    document.querySelectorAll("[data-close='area']").forEach(function (button) {
      button.addEventListener("click", closeAreaModal);
    });
  }

  function loadProfileName() {
    apiRequest("/system/user/profile", { method: "GET" }).then(function (result) {
      applyUserInfo(result.data || {});
    }).catch(function () {
      applyUserInfo(readLoginUser());
    });
  }

  function loadAreaTree() {
    apiRequest("/system/visit/area/tree", {
      method: "POST",
      body: JSON.stringify({
        areaName: document.getElementById("areaSearchInput").value.trim()
      })
    }).then(function (result) {
      state.tree = Array.isArray(result.data) ? result.data : [];
      state.flat = flattenAreas(state.tree);
      renderTree();
    }).catch(function (error) {
      state.tree = [];
      state.flat = [];
      renderTree();
      AppMessage.error("操作失败：" + (error.message || "区域列表加载失败"));
    });
  }

  function renderTree() {
    var root = document.getElementById("areaTree");
    var empty = document.getElementById("areaEmpty");
    empty.hidden = state.tree.length > 0;
    root.innerHTML = state.tree.map(function (area, index) {
      return renderNode(area, 1, index + 1);
    }).join("");

    root.querySelectorAll("[data-action]").forEach(function (button) {
      button.addEventListener("click", function (event) {
        event.stopPropagation();
        var action = button.getAttribute("data-action");
        var areaId = Number(button.getAttribute("data-id"));
        if (action === "addChild") {
          openAreaModal("add", { parentId: areaId });
        } else if (action === "edit") {
          editArea(areaId);
        } else if (action === "delete") {
          confirmDelete(areaId);
        }
      });
    });

    root.querySelectorAll(".area-node-content").forEach(function (row) {
      row.addEventListener("click", function () {
        var node = row.closest(".area-node");
        state.selectedAreaId = Number(node.getAttribute("data-id"));
        renderTree();
      });
    });

    root.querySelectorAll(".area-toggle").forEach(function (button) {
      button.addEventListener("click", function (event) {
        event.stopPropagation();
        button.closest(".area-node").classList.toggle("collapsed");
      });
    });
  }

  function renderNode(area, level, index) {
    var children = Array.isArray(area.children) ? area.children : [];
    var hasChildren = children.length > 0;
    var active = state.selectedAreaId === area.areaId;
    var disabled = isAreaDisabled(area);
    var childHtml = hasChildren ? '<div class="area-children">' + children.map(function (child, childIndex) {
      return renderNode(child, level + 1, childIndex + 1);
    }).join("") + '</div>' : "";
    var rowClass = "area-node-content" + (active ? " active" : "") + (disabled ? " disabled" : "");
    var actions = disabled ? [
      '    <span class="area-disabled-tip"><span class="area-disabled-badge">禁</span><span>当前部门已禁用，禁止点击</span></span>'
    ] : [
      '    <button class="area-action add-child" type="button" data-action="addChild" data-id="' + area.areaId + '">添加下级</button>',
      '    <button class="area-action edit" type="button" data-action="edit" data-id="' + area.areaId + '">编辑</button>',
      '    <button class="area-action delete" type="button" data-action="delete" data-id="' + area.areaId + '">删除</button>',
      '    <span class="area-disabled-tip"></span>'
    ];
    return [
      '<div class="area-node level-' + level + (hasChildren ? "" : " no-children") + '" data-id="' + area.areaId + '">',
      '  <div class="' + rowClass + '">',
      '    <button class="area-toggle" type="button" title="展开/收起"></button>',
      '    <span class="' + (level === 1 ? "area-folder-icon" : "area-file-icon") + '"></span>',
      '    <span class="area-name">' + escapeHtml(area.areaName || "-") + '</span>',
      actions.join(""),
      '  </div>',
      childHtml,
      '</div>'
    ].join("");
  }

  function isAreaDisabled(area) {
    return area && (area.enabled === false || area.disabled === true || area.status === "1" || area.status === 1);
  }

  function openAreaModal(mode, area) {
    state.mode = mode;
    state.currentAreaId = mode === "edit" ? area.areaId : null;
    document.getElementById("areaModalTitle").textContent = mode === "edit" ? "编辑区域" : "添加区域";
    renderParentOptions(area.parentId || 0, state.currentAreaId);
    document.getElementById("areaCode").value = area.areaCode || "";
    document.getElementById("areaName").value = area.areaName || "";
    document.getElementById("areaDesc").value = area.areaDesc || "";
    document.getElementById("areaModal").hidden = false;
  }

  function closeAreaModal() {
    document.getElementById("areaModal").hidden = true;
  }

  function editArea(areaId) {
    apiRequest("/system/visit/area/detail", {
      method: "POST",
      body: JSON.stringify({ areaId: areaId })
    }).then(function (result) {
      openAreaModal("edit", result.data || {});
    }).catch(function (error) {
      AppMessage.error("操作失败：" + (error.message || "区域详情加载失败"));
    });
  }

  function saveArea() {
    var saveButton = document.getElementById("saveAreaButton");
    var areaName = document.getElementById("areaName").value.trim();
    if (!areaName) {
      AppMessage.error("操作失败：请输入区域名称");
      return;
    }
    var payload = {
      parentId: Number(document.getElementById("parentId").value || 0),
      areaCode: document.getElementById("areaCode").value.trim(),
      areaName: areaName,
      areaDesc: document.getElementById("areaDesc").value.trim(),
      orderNum: 0
    };
    var url = "/system/visit/area/add";
    if (state.mode === "edit") {
      payload.areaId = state.currentAreaId;
      url = "/system/visit/area/edit";
    }

    saveButton.disabled = true;
    apiRequest(url, {
      method: "POST",
      body: JSON.stringify(payload)
    }).then(function () {
      closeAreaModal();
      AppMessage.success("操作成功");
      loadAreaTree();
    }).catch(function (error) {
      AppMessage.error("操作失败：" + (error.message || "区域保存失败"));
    }).then(function () {
      saveButton.disabled = false;
    });
  }

  function confirmDelete(areaId) {
    AppConfirm.open({
      title: "是否确认删除数据？",
      message: "删除操作不可撤回，请谨慎操作",
      onConfirm: function () {
        return apiRequest("/system/visit/area/delete", {
          method: "POST",
          body: JSON.stringify({ areaIds: [areaId] })
        }).then(function () {
          AppMessage.success("操作成功");
          loadAreaTree();
        });
      }
    });
  }

  function renderParentOptions(selectedParentId, currentAreaId) {
    var select = document.getElementById("parentId");
    var options = ['<option value="0">不选择表示为一级区域</option>'];
    state.flat.forEach(function (area) {
      if (area.areaId === currentAreaId || isDescendant(area, currentAreaId)) {
        return;
      }
      options.push('<option value="' + area.areaId + '">' + escapeHtml(indentText(area.level) + area.areaName) + '</option>');
    });
    select.innerHTML = options.join("");
    select.value = String(selectedParentId || 0);
  }

  function flattenAreas(tree) {
    var result = [];
    tree.forEach(function (area) {
      walk(area, 1, result);
    });
    return result;
  }

  function walk(area, level, result) {
    area.level = level;
    result.push(area);
    (area.children || []).forEach(function (child) {
      walk(child, level + 1, result);
    });
  }

  function isDescendant(area, parentId) {
    if (!parentId || !area) {
      return false;
    }
    var current = area;
    while (current && current.parentId) {
      if (current.parentId === parentId) {
        return true;
      }
      current = findArea(current.parentId);
    }
    return false;
  }

  function findArea(areaId) {
    for (var index = 0; index < state.flat.length; index++) {
      if (state.flat[index].areaId === areaId) {
        return state.flat[index];
      }
    }
    return null;
  }

  function indentText(level) {
    return new Array(level).join("　");
  }

  function apiRequest(path, options) {
    options = options || {};
    var headers = options.headers || {};
    var token = getToken();
    if (token) {
      headers.Authorization = "Bearer " + token;
    }
    if (!options.skipJson) {
      headers["Content-Type"] = "application/json";
    }

    return fetch(getApiBaseUrl() + normalizePath(path), {
      method: options.method || "GET",
      headers: headers,
      body: options.body
    }).then(function (response) {
      return response.json().catch(function () {
        return { code: response.ok ? 200 : response.status, msg: response.statusText };
      });
    }).then(function (result) {
      if (result.code === 401) {
        clearLoginState();
        redirectToLogin();
        throw new Error(result.msg || "登录状态已过期");
      }
      if (result.code !== 200) {
        throw new Error(result.msg || "请求失败");
      }
      return result;
    });
  }

  function logout() {
    apiRequest("/logout", {
      method: "POST",
      skipJson: true
    }).catch(function () {
      return null;
    }).then(function () {
      clearLoginState();
      redirectToLogin();
    });
  }

  function applyUserInfo(user) {
    user = user || {};
    var displayName = user.nickName || user.userName || user.username || "用户";
    document.getElementById("userDisplayName").textContent = displayName;
    document.querySelector(".user-avatar").textContent = displayName.substring(0, 1);
  }

  function readLoginUser() {
    try {
      var loginResult = JSON.parse(localStorage.getItem("visitor_admin_login_result") || "{}");
      return (loginResult.userInfo && loginResult.userInfo.user) || loginResult.user || {};
    } catch (error) {
      return {};
    }
  }

  function shortDate(value) {
    return value ? String(value).slice(0, 10).replace(/-/g, ".") : "";
  }

  function getApiBaseUrl() {
    return trimRightSlash(localStorage.getItem("visitor_admin_api_base") || config.apiBaseUrl || window.location.origin);
  }

  function getToken() {
    return localStorage.getItem("visitor_admin_token") || "";
  }

  function clearLoginState() {
    localStorage.removeItem("visitor_admin_token");
    localStorage.removeItem("visitor_admin_login_result");
    localStorage.removeItem("visitor_admin_api_base");
  }

  function redirectToLogin() {
    window.location.href = "../index.html";
  }

  function normalizePath(path) {
    return "/" + String(path || "").replace(/^\/+/, "");
  }

  function trimRightSlash(value) {
    return String(value || "").replace(/\/+$/, "");
  }

  function escapeHtml(value) {
    return String(value == null ? "" : value).replace(/[&<>"']/g, function (char) {
      return {
        "&": "&amp;",
        "<": "&lt;",
        ">": "&gt;",
        '"': "&quot;",
        "'": "&#39;"
      }[char];
    });
  }
})();